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Restructuring and Other Costs (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Sep. 30, 2017 | Jun. 30, 2017 | Mar. 31, 2017 | Sep. 30, 2017 | Dec. 31, 2016
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Restructuring Charges |  |  |  | $ 177 |
Cost of Sales [Member] |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Restructuring Charges |  |  |  | 81 |
Selling, General and Administrative Expenses [Member] |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Restructuring Charges |  |  |  | 96 |
Current Year Actions [Member] |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Restructuring Charges |  |  |  | 114 |
Restructuring Reserve | $ 72 | $ 43 |  | 72 |
Net pre-tax restructuring costs (reversals) | 51 | 39 | $ 24 | 114 |
Utilization and foreign exchange | 22 |  |  | 42 |
Expected Costs | 218 |  |  | 218 |
Remaining Costs | 104 |  |  | 104 |
Current Year Actions [Member] | Cost of Sales [Member] |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Restructuring Charges |  |  |  | 40 |
Current Year Actions [Member] | Selling, General and Administrative Expenses [Member] |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Restructuring Charges |  |  |  | 74 |
Current Year Actions [Member] | Severance [Member] |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Restructuring Reserve | 72 | 43 |  | 72 |
Net pre-tax restructuring costs (reversals) | 49 |  |  | 106 |
Utilization and foreign exchange | 20 |  |  | 34 |
Current Year Actions [Member] | Facility Exit, Lease Termination and Other Costs |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Restructuring Reserve | 0 | 0 |  | 0 |
Net pre-tax restructuring costs (reversals) | 2 |  |  | 8 |
Utilization and foreign exchange | 2 |  |  | 8 |
Prior Year Actions [Member] |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Restructuring Charges |  |  |  | 48 |
Restructuring Reserve | 92 | 97 |  | 92 | $ 109
Net pre-tax restructuring costs (reversals) | 8 | 18 | 22 | 48 | 242
Utilization and foreign exchange | 13 |  |  | 65 |
Expected Costs | 340 |  |  | 340 |
Remaining Costs | 50 |  |  | 50 |
Prior Year Actions [Member] | Cost of Sales [Member] |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Restructuring Charges |  |  |  | 20 |
Prior Year Actions [Member] | Selling, General and Administrative Expenses [Member] |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Restructuring Charges |  |  |  | 28 |
Prior Year Actions [Member] | Severance [Member] |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Restructuring Reserve | 40 | 49 |  | 40 | 63
Net pre-tax restructuring costs (reversals) | 3 |  |  | 29 |
Utilization and foreign exchange | 12 |  |  | 52 |
Prior Year Actions [Member] | Facility Exit, Lease Termination and Other Costs |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Restructuring Reserve | 52 | 48 |  | 52 | 46
Net pre-tax restructuring costs (reversals) | 5 |  |  | 19 |
Utilization and foreign exchange | 1 |  |  | 13 |
Two Years Prior Actions [Member] |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Restructuring Charges |  |  |  | 15 |
Restructuring Reserve | 52 |  |  | 52 |
Otis [Member] |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Restructuring Charges |  |  |  | 23 |
Otis [Member] | Current Year Actions [Member] |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Net pre-tax restructuring costs (reversals) | 5 | 12 | 2 |  |
Expected Costs | 71 |  |  | 71 |
Remaining Costs | 52 |  |  | 52 |
Otis [Member] | Prior Year Actions [Member] |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Net pre-tax restructuring costs (reversals) | 0 | (1) | 3 |  | 48
Expected Costs | 55 |  |  | 55 |
Remaining Costs | 5 |  |  | 5 |
UTC Climate, Controls & Security [Member] |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Restructuring Charges |  |  |  | 84 |
UTC Climate, Controls & Security [Member] | Current Year Actions [Member] |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Net pre-tax restructuring costs (reversals) | 35 | 11 | 12 |  |
Expected Costs | 83 |  |  | 83 |
Remaining Costs | 25 |  |  | 25 |
UTC Climate, Controls & Security [Member] | Prior Year Actions [Member] |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Net pre-tax restructuring costs (reversals) | 3 | 7 | 6 |  | 45
Expected Costs | 80 |  |  | 80 |
Remaining Costs | 19 |  |  | 19 |
Pratt & Whitney [Member] |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Restructuring Charges |  |  |  | 4 |
Pratt & Whitney [Member] | Current Year Actions [Member] |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Net pre-tax restructuring costs (reversals) | 0 | 6 | 0 |  |
Expected Costs | 8 |  |  | 8 |
Remaining Costs | 2 |  |  | 2 |
Pratt & Whitney [Member] | Prior Year Actions [Member] |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Net pre-tax restructuring costs (reversals) | 0 | 0 | 0 |  | 118
Expected Costs | 118 |  |  | 118 |
Remaining Costs | 0 |  |  | 0 |
UTC Aerospace Systems [Member] |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Restructuring Charges |  |  |  | 64 |
UTC Aerospace Systems [Member] | Current Year Actions [Member] |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Net pre-tax restructuring costs (reversals) | 10 | 10 | 9 |  |
Expected Costs | 54 |  |  | 54 |
Remaining Costs | 25 |  |  | 25 |
UTC Aerospace Systems [Member] | Prior Year Actions [Member] |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Net pre-tax restructuring costs (reversals) | 5 | $ 12 | 13 |  | $ 31
Expected Costs | 87 |  |  | 87 |
Remaining Costs | 26 |  |  | 26 |
Eliminations and other [Member] |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Restructuring Charges |  |  |  | 2 |
Eliminations and other [Member] | Current Year Actions [Member] |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Net pre-tax restructuring costs (reversals) | (1) |  | $ (1) |  |
Expected Costs | 2 |  |  | 2 |
Remaining Costs | $ 0 |  |  | $ 0 |

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- Definition Amount expected to be recognized in earnings for the specified restructuring cost. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB Topic 5.P.4(b)) -URI http://asc.fasb.org/extlink&oid=27011515&loc=d3e140904-122747 + Details
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